如何在 Xcode 中左对齐导航栏的标题？
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How do I left align the title of a navigation bar in Xcode?
提问by Shamar Yarde
I've been trying the following in order to get the title of a navigation bar left aligned:
我一直在尝试以下方法以使导航栏的标题左对齐：
In the AppDelegate.swiftfile:
在AppDelegate.swift文件中：
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
UINavigationBar.appearance().barTintColor = UIColor.red
UINavigationBar.appearance().titleTextAttributes = [NSForegroundColorAttributeName:
UIColor.white]
return true
}
In a TableViewController.swiftfile:
在一个TableViewController.swift文件中：
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
self.navigationController?.navigationBar.topItem?.title = "Home"
}
but nothing I find solves the problem. I also tried the following that I found on here which does not show anything:
但我发现没有什么能解决问题。我还尝试了我在此处找到的以下内容，但没有显示任何内容：
in the AppDelegate.swiftfile:
在AppDelegate.swift文件中：
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
UINavigationBar.appearance().barTintColor = UIColor.red
UINavigationBar.appearance().titleTextAttributes = [NSForegroundColorAttributeName:
UIColor.white]
let lbNavTitle = UILabel (frame: CGRect(x: 0, y: 40, width: 320, height: 40))
lbNavTitle.center = CGPoint(x: 160, y: 285)
lbNavTitle.textAlignment = .left
lbNavTitle.text = "Home"
self.navigationItem.titleView = lbNavTitle
In a TableViewController.swiftfile:
在一个TableViewController.swift文件中：
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
self.navigationController?.navigationBar.topItem?.title = "Home"
let lbNavTitle = UILabel (frame: CGRect(x: 0, y: 0, width: 320, height: 40))
lbNavTitle.backgroundColor = UIColor.red
lbNavTitle.textColor = UIColor.black
lbNavTitle.numberOfLines = 0
lbNavTitle.center = CGPoint(x: 0, y: 0)
lbNavTitle.textAlignment = .left
lbNavTitle.text = "Home"
let string = NSMutableAttributedString ("Title/nSubTitle")
self.navigationItem.titleView = lbNavTitle
}
采纳答案by Upholder Of Truth
You can use the navigationItems titleView to add a UILabel with left alignment and then set its frame using auto layout like this:
您可以使用 navigationItems titleView 添加一个左对齐的 UILabel，然后使用自动布局设置其框架，如下所示：
let label = UILabel()
label.text = "Title Label"
label.textAlignment = .left
self.navigationItem.titleView = label
label.translatesAutoresizingMaskIntoConstraints = false
label.superview?.addConstraint(NSLayoutConstraint(item: label, attribute: .centerX, relatedBy: .equal, toItem: label.superview, attribute: .centerX, multiplier: 1, constant: 0))
label.superview?.addConstraint(NSLayoutConstraint(item: label, attribute: .width, relatedBy: .equal, toItem: label.superview, attribute: .width, multiplier: 1, constant: 0))
label.superview?.addConstraint(NSLayoutConstraint(item: label, attribute: .centerY, relatedBy: .equal, toItem: label.superview, attribute: .centerY, multiplier: 1, constant: 0))
label.superview?.addConstraint(NSLayoutConstraint(item: label, attribute: .height, relatedBy: .equal, toItem: label.superview, attribute: .height, multiplier: 1, constant: 0))
回答by Ilker Baltaci
let label = UILabel()
label.textColor = UIColor.white
label.text = "TCO_choose_reminder".localized;
self.navigationItem.leftBarButtonItem = UIBarButtonItem.init(customView: label)
I init a UIBarButtonItem with the constructor that gets a UIView and set my desired label as parameter to get the following.
我使用获取 UIView 的构造函数初始化 UIBarButtonItem 并将所需的标签设置为参数以获取以下内容。
